CN101128891B - Automatic dehydrating breather apparatus and dehydrating system - Google Patents
Automatic dehydrating breather apparatus and dehydrating system Download PDFInfo
- Publication number
- CN101128891B CN101128891B CN2005800486184A CN200580048618A CN101128891B CN 101128891 B CN101128891 B CN 101128891B CN 2005800486184 A CN2005800486184 A CN 2005800486184A CN 200580048618 A CN200580048618 A CN 200580048618A CN 101128891 B CN101128891 B CN 101128891B
- Authority
- CN
- China
- Prior art keywords
- steam
- valve
- tank body
- dehydrating breather
- valve chest
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000004891 communication Methods 0.000 claims abstract description 15
- 238000009423 ventilation Methods 0.000 claims description 25
- 230000007246 mechanism Effects 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 4
- 230000000903 blocking effect Effects 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 abstract description 3
- 238000010926 purge Methods 0.000 abstract 2
- 230000000887 hydrating effect Effects 0.000 abstract 1
- 239000002274 desiccant Substances 0.000 description 27
- 239000002245 particle Substances 0.000 description 11
- 238000000034 method Methods 0.000 description 10
- 239000000463 material Substances 0.000 description 8
- 230000008569 process Effects 0.000 description 6
- 238000013461 design Methods 0.000 description 4
- 238000007599 discharging Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 229910000906 Bronze Inorganic materials 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000010974 bronze Substances 0.000 description 2
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 230000001960 triggered effect Effects 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 210000000988 bone and bone Anatomy 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 235000015927 pasta Nutrition 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
- B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
- B01D53/0407—Constructional details of adsorbing systems
- B01D53/0415—Beds in cartridges
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
- H01F27/10—Liquid cooling
- H01F27/12—Oil cooling
- H01F27/14—Expansion chambers; Oil conservators; Gas cushions; Arrangements for purifying, drying, or filling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
- B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
- B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
- B01D53/0454—Controlling adsorption
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/26—Drying gases or vapours
- B01D53/261—Drying gases or vapours by adsorption
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/25—Coated, impregnated or composite adsorbents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/80—Water
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/40—Further details for adsorption processes and devices
- B01D2259/40007—Controlling pressure or temperature swing adsorption
- B01D2259/40009—Controlling pressure or temperature swing adsorption using sensors or gas analysers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/40—Further details for adsorption processes and devices
- B01D2259/40083—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption
- B01D2259/40088—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption by heating
- B01D2259/40096—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption by heating by using electrical resistance heating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
- B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
- B01D53/0407—Constructional details of adsorbing systems
- B01D53/0438—Cooling or heating systems
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Power Engineering (AREA)
- Drying Of Gases (AREA)
- Respiratory Apparatuses And Protective Means (AREA)
- Treatment Of Fiber Materials (AREA)
- External Artificial Organs (AREA)
Abstract
A dehydrator breather appartus (10, 100) for hydrating air (29) in a container (27), which includes purging of accumulated moisture by detecting (111) absorbed moisture in the breather (125) by closing an air passageway (105) while opening a moisture exit port (119 ) . A control module (101) adjusts a default time-based purge cycle to account for fluctuations in the detected moisture. The control module (101) includes an external communication capability (175) to enable a monitoring station to monitor the breather appartus (10, 100).
Description
The application requires to submit on July 23rd, 2004, sequence number is 10/896; 989, name is called the priority of the U.S. Patent application of " dehydrating breather apparatus and method "; And the application is the non-neutralizable fraction of said U. S. application; Said U.S. Patent application be submitted on September 6th, 2002, sequence number is 10/235,795, name is called the dividing an application of U.S. Patent application of " dehydrating breather apparatus and method ".The disclosed full content of above-mentioned U.S. Patent application is incorporated into here by reference.
Present invention relates in general in order to remove the dehydrator of airborne steam, especially, the present invention is devoted to the automatic dehydrating breather of power equipment.
High power electrical equipment like high-power transformer, load tap changing device and circuit breaker, generally immerses in the oil, utilizes said oil-insulation and cooling power equipment.Owing to oil expands and shrinks along with variation of temperature, this kind equipment is provided with a headroom with atmosphere above pasta, so that control the for example interior pressure of transformer tank.Must keep the pressure in the oil groove, so that prevent to produce in the oil bubble of the dielectric strength that can reduce oil.
When temperature in the oil groove increased, the oil in the oil groove expanded, and the oil groove internal pressure raises, and the air in the oil sump is discharged from oil groove.When oil groove began to cool down, the oil in the oil groove shrank, and the oil groove internal pressure reduces, and air is inhaled into oil groove to keep the pressure in the oil groove.
Conventionally, utilize dehydrating breather to regulate air inflow or outflow oil groove.In some dehydrating breather, between tank container and outside air, be provided with air vent hole, and between said air vent hole and dehydrating breather container, valve be set, flow into control air and flow out oil groove through the pressure in the said valve control of the opening and closing as required oil groove.
Usually, dehydrating breather comprises a kind of desiccant material, like silica gel, is used for before air enters into oil groove inside, removing all steam wherein.Water is electric conductor, so steam gets into the electrology characteristic that oil groove can destroy transformer.
Yet when drier spilt desiccant container, problem will produce.For example in cargo handling process, drier possibly be fragmented into the tiny bulk that spills desiccant container, and in addition, any desiccant particles maybe be with the air of discharging dehydrating breather through said valve, is deposited in the valve or attached to the air vent hole top.
Further, evaporate the condensation on the wall in dehydrating breather usually of the steam that by the drying of drier.When being condensed into liquid state, will flow through valve and via the orifice flow in the air vent hole in atmosphere.Yet,, may make steam be stranded resistance in tank container, thereby drier can not bone dry if any desiccant particles is deposited in the valve or sticks in the air vent hole.As a result, dehydrating breather can not be carried out its functions/drying.
Therefore, a kind of dehydrating breather need be provided, said dehydrating breather can not make any desiccant particles that possibly from desiccant container, spill disturb the operation of dehydrating breather.Summary of the invention
The present invention has satisfied aforementioned need to a great extent, wherein, in one aspect, the invention provides a kind of dehydrating breather, and said dehydrating breather comprises tank container, valve chest that is connected with said tank container and the ventilation assembly that is connected with said valve chest.Said ventilation assembly comprises ventilation assembly body and at least one screened.Said screened is arranged along the vertical axis of said ventilation assembly body.The steam that desiccant material absorbed in the said tank container is discharged said tank container via air vent hole, and in the process of discharging, air vent hole is opening and closing operationally.
In another aspect of the present invention, the dehydrating breather apparatus that is used for removing the airborne moisture in the container comprises tank body, be connected in the drier that holds in the gas channel that can close automatically in the tank body of said container, the said tank body, be installed in automatically controlled heating element, the drainage pipe in the said tank body and the humidity sensor of drier in the said tank body.
In another aspect of the present invention, be used for removing the dehydrating breather apparatus of airborne moisture in the container comprise the dewater unit, the airflow apparatus that is used for the air of the said container of drainage between said container and said dewater unit that are used for absorbing airborne steam and discharge water vapour, be used for the steam that drainage discharges outlet device, be used for blocking said airflow apparatus drainage air from the moving air flow occluding device, the automatic outlet occluding device, the dehydration part that are used to block the steam of discharging at said outlet device is used to heat so that the heater that the steam that absorbs discharges from said dewater unit, be used to detect steam sensing device and the control device that is used to control said heater, reaches said air-flow occluding device and said outlet occluding device of the airborne steam of said container.
In another aspect of the present invention; Be used to remove that the method for airborne moisture comprises in the container; The housing that will have drier attaches to the air duct that is connected with said container; Monitor the humidity of said drier, remove the steam in the said drier, and discharge the steam of removing with the outlet of opening housing bottom through closing said air duct through heating said drier.
Arrive this, we sketch the contours of some execution mode of the present invention comparatively roughly, so that understand relevant with it detailed description better, and understand the contribution of the present invention better to prior art.Certainly, the present invention also has other execution mode, and hereinafter with described, and they will form the theme of accompanying claims.
In this respect, before specifying at least one execution mode of the present invention, should be understood that, the present invention its application is not confined to propose in the explanation of hereinafter and accompanying drawing in the CONSTRUCTED SPECIFICATION that shows and the arrangement mode of parts.The present invention can realize with the execution mode outside the execution mode of those explanations, and can realize in a different manner and accomplish.And, need should be appreciated that, the wording and the term that adopt in this specification and the summary, its purpose all is in order to explain, and should not be regarded as restriction.
So, one skilled in the art will appreciate that the notion of disclosure institute foundation can easily be utilized as the basis of the design of other structures of some purpose of embodiment of the present invention, method and system.Therefore, importantly: claim should be regarded as the structure that has comprised this type equivalence, as long as it does not break away from the spirit and scope of the present invention.Description of drawings
Fig. 1 is the exploded view according to exemplary dehydrating breather of the present invention.
Fig. 2 is the exemplary filter and the front view of filter support.
Fig. 3 is the viewgraph of cross-section of exemplary valve chest.
Fig. 4 is another exemplary dehydrating breather system architecture diagram.
Fig. 5 is the structured flowchart of the exemplary control module of exemplary dehydrating breather.Embodiment
Referring now to the Fig. 1 in the accompanying drawing,, similar Reference numeral is represented similar member in the accompanying drawing, and shown in Figure 1 is according to dehydrating breather 10 of the present invention.As shown in Figure 1, said dehydrating breather 10 comprises jar 12, and in typical embodiment of the present invention, said jar 12 is to process by glass or such as the transparent plastic of Merlon.In illustrative embodiments of the present invention, as shown in Figure 1, said jar 12 be shaped as is cylindrical.
In exemplary execution mode of the present invention, said desiccant container 14 is processed by the screen material that in desiccant container 14, forms opening.In same or execution mode that another is exemplary of the present invention, said drier is capped the indicative material of one deck, makes the color of drier change according to the humidity that drier kept.Opening in the desiccant container 14 makes it possible to visual observation from said container 14 to drier, and therefore can confirm the state of drier.Opening in the said desiccant container 14 also makes steam overflow from desiccant container.
What be connected with jar 12 bottoms is valve chest 24.In exemplary execution mode of the present invention, valve chest 24 comprises ball float 26.Said ball float 26 is installed in the valve chest 24, and according to jar 12 with, for example, the draught head control between the transformer tank 27 flows to and flows out jars 12 air-flow.
For example, when oil 29 expands in transformer tank 27 inside, force the air in the headroom 29 from transformer tank 27, to escape and enter jar 12.Therefore, the air pressure in the transformer tank 27 is greater than the air pressure in the jar 12.Ball 26 is enough light, causes it to move up, thereby air can flow out via valve housing 24 from jar 12.
When jar 12 air pressure inside during greater than transformer tank 27 air pressure inside, move on the ball 26, thereby air can be discharged from headroom 29, pass jars 12, and discharge outside the valve chest 24.When jar 12 air pressure inside during greater than transformer tank 27 air pressure inside, move on the ball 26, get in valve chest 24 and/or the ventilation assembly 34 to allow air, pass jars 12, and get into the headroom 29 of oil groove 27.For example, when not having pressure differential between transformer tank 27 and jar 12 inside, ball 26 blocks air get into jar 12, get into dehydrating breather 10 and transformer tank 27 with the non-essential air of avoiding containing steam.
In exemplary execution mode of the present invention, between jar 12 and housing 24, be provided with sealing gasket 28, for example packing ring gets into dehydrating breather 10 to prevent water vapour in the joint place of jar 12 and housing 24.In exemplary execution mode of the present invention, assemble mechanism 16,18 and locking mechanism 30,32 are used to housing 24 is fixed to jar 12.
In exemplary execution mode of the present invention, the ventilation assembly comprises sintered bronze vents.In another exemplary execution mode of the present invention, ventilation assembly 34, for example muffler is connected in valve chest 24.Muffler 34 of the present invention has improved the operation of dehydrating breather, because sintered bronze vents has the minute aperture that can catch any desiccant particles that from desiccant container 14, spills.In exemplary execution mode of the present invention, muffler 34 has threaded portion with valve chest 24, thereby muffler 34 can be screwed on the valve chest 24, and can easily screw off from valve chest 24.
In same or execution mode that another is exemplary of the present invention, muffler 34 has opening, for example vertically disposed opening 36-42.In exemplary execution mode of the present invention, opening 36-42 is covered by screen material 44-50.Screened 36-42 allows air to flow into and flows out jars 12.Screened 36-42 also plays a part to filter the airborne particulate in the suction muffler 34.Should be understood that, can change the number that covers the used filter screen of opening 36-42 fully.
When ventilation assembly 34 no longer can hold more any desiccant particles, ventilation assembly 34 can screw off from valve chest 24, so that empty any desiccant particles.In addition, ventilation assembly 34 allows any water that flows through valve chest to pass through screened.Therefore, avoided any desiccant particles to flowing to and flow out the obstruction of the air stream of valve chest 24 according to the design of dehydrating breather of the present invention.
In exemplary execution mode of the present invention, 50 stainless steel filtering net material is used to opening 36-42.In exemplary execution mode of the present invention, the body/shell of ventilation assembly 34 is processed by plastic material.In exemplary execution mode of the present invention, the ventilation assembly is by Adsens Technology of City of Industry, the high flow capacity muffler that CA makes.
In exemplary execution mode of the present invention, filter 52 is arranged in the jar 12.In exemplary execution mode of the present invention, filter 52 is processed by all-glass paper.In same or execution mode that another is exemplary of the present invention, bracing frame 54,56 is used for filter 52 is fixed in jars 12.In exemplary execution mode of the present invention, assemble mechanism 16,18 is used for filter 52 and supports filter screen 54,56 being fixed in the jar.Fixed mechanism, for example bolt 58-64 is used for bracing frame 54,56 is fixed to filter 52.
Shown in Figure 2 is filter support 76 according to the present invention and filter 78.Can be provided with on the filter support 76 with filter 78 on the opening 80 and 82 aimed at of opening 84 and 86.In exemplary execution mode of the present invention, filter 78 is a cylindrical shape with filter support 76.In same or execution mode that another is exemplary of the present invention, filter support 76 is processed by screen material.
Shown in Figure 3 is viewgraph of cross-section according to valve chest 24 of the present invention.As shown in Figure 3, valve 88 is formed in the valve chest 24.In exemplary execution mode of the present invention, valve 88 is a ball-cock assembly, and wherein ball 26 places on the valve seat 90.
Fig. 4 is the structured flowchart that is connected in another exemplary dehydrating breather 100 of oil groove 27.Said exemplary dehydrating breather 125 with drier (not shown) is connected in the oil groove 27 that inside has sky G&O 29.Said exemplary dehydrating breather 125 is connected in air duct 105, so that air 29 enters into said exemplary dehydrating breather 125 from oil groove 27.Air-flow in the air duct 105 is controlled with starter gate valve 115 by solenoid 117.Solenoid 117 is controlled through signal/power line 103 by control module 101.Steam or humidity sensor 109 and 111 be located at respectively in the air 29 of oil groove 27 with exemplary dehydrating breather 125 in.Humidity sensor 109 is connected in control module 101 through signal/power line 103.
In the suitable position of exemplary dehydrating breather 125, the valve 135 that another solenoid 137 starts is set, accumulate in the passage of the water in the dehydrating breather 125 via outlet 119 with control.Solenoid 137 is by the signal/power line that is connected in control module 101 103 controls.Said exemplary dehydrating breather 125 comprises by the heating element 106 of control module 101 through 104 controls of signal/power line.Being connected in the said control module 101 of signal/power line 103,104 and control module 101 is shown as 110,120,130,140 and 150 respectively.
Be in operation, control module 101 detects the humidity in the air 29 of oil grooves 27 through humidity sensor 109, and through the humidity in the dehydrating breather 125 of humidity sensor 111 detection example property.Based on any or two humidity values of reading from humidity sensor 109,111, control module 101 is removed circulation through activation signal/power line 104 with the steam that heats said heating element 106 and begin dehydrating breather 125.Before thermal cycle begins or with thermal cycle, begin simultaneously, control module 101 to air duct 105 in the solenoid 117 generation signals that are connected of valve 115, with shut off valve 115.Closing of valve 115 begins to prevent that steam is via the air 29 of air duct 105 in dehydrating breather 125 enters into oil groove 27 again.Through stopping up the pipeline of this air that leads to oil groove 27 29, are unique passages from dehydrating breather 125 interior steam of discharging through the outlet 119 that jointly controls by valve 135 and solenoid 137.In getting rid of the steam cyclic process, control module 101 open valves 135 are so that steam superfluous or that gather can be gone out in the dehydrating breather 125.From dehydrating breather 125 removing steam the time, control module 101 is through the control shut off valve 135 of control solenoid 137.At end erase steam circulation time just in time, buttoned-up valve 115 can be opened in air duct 105.The timing controlled of each valve 115 and 135 opening and closing can be coordinated with humidity sensor 109 and 111 suitable readings mutually.
Through using the moisture sensor 111 in dehydrating breather 125, the override capability when exemplary execution mode depicted in figure 4 can be provided for the humidity discussed like hereinafter-timing configured.Should see,, use the solenoid valve system of one also not break away from the spirit and scope of the present invention although show that in illustrative embodiments shown in Figure 4 solenoid 117 separates with 135 with corresponding valve 115 respectively with 137.In addition, each device can use control line and power line separately, but not single control/power line.Moreover solenoid 117 and 137 can be connected to each other with serial operation.
Fig. 5 is the structural frames Figure 200 that has shown exemplary control module 201.Exemplary control module 201 comprises power terminal 163, and said power terminal 163 provides electric energy to humidity controller 155, relay controller 165, optional communication (COM) controller 175 with optional timing controller 185 through power line 159.Communication and controlled function back and forth are transmitted between humidity controller 155 and relay controller 165, communication controler 175 and the timing controller 185 via signal/data/address bus 104,164 and 174 respectively.Between timing controller 185 and relay controller 165, be provided with separate signal bus 184, be used for relay controller 165 is carried out independent control.Connection/bus 180 is connected with communication controler 175, is used for external communication.
Should see that in described illustrative embodiments, relay controller 165 is mechanical relays, yet for example using, the on-mechanical type relay or the switch of switching transistor, logical circuit etc. also should not break away from the spirit and scope of the present invention.Moreover, through using discrete parts or circuit or integrated circuit as required, can realize the various functions of humidity controller 155 and timing controller 185.Based on declaratives of the present invention described here, the required various controllers that those of ordinary skill ready-made product capable of using or customed product are realized describing in the literary composition, or with the different combinations mode product is made an amendment as required.For example, although explanation communication controler 175 is not directly controlled timing controller 185 or direct communication with it, as need, the technical staff can design control and/or the communication path of timing controller 185 so that directly control timing controller 185.
When using together with timing controller 185; Exemplary control module 201 lags behind by under the humidity controller situation of 155 determined intervals in case of necessity when in timing controller 185, designing interval, can provide override function to strengthen the steam ability of removing of dehydrating breather 125.On the contrary, interval,, the leading suitable steam that removes was at interval the time when humidity controller 155 is confirmed in timing controller, to set, but humidity controller 155 delay starts remove the steam process.For example, timing controller 185 possibly be designated as and have fixing repetition period and fixing removing during the steam.Since the wherein fixing cycle with during configuration, in spring and winter, timing controller 185 may not suitably be handled excessive humidity increment.And, the excessive vapour cycle or long drier in the dehydrating breather 125 are degenerated during removing steam of dewatering.Application has the humidity controller 155 of override capability can more effectively be carried out except that the steam process, therefore, has prolonged the life-span that is contained in the drier in the dehydrating breather 125.
Should see that as required, the override capability of humidity controller 155 can comprise the specified time cycle of timing controller 185 and the adjustment of run duration.For example, humidity controller 155 can only be triggered once in per four or five time cycles.Therefore, if the removing after the steam operational cycle of the timing controller 185 of selected number, humidity controller 155 can be triggered, and removes steam fully to determine whether the air 29 in the oil groove 27 or dehydrating breathers 125 have been accomplished.If the time cycle that is provided according to timing controller 185 or during realize removing fully steam unsatisfactorily, then humidity controller 155 can adjust selectively wherein cycle or during so that remove steam more efficiently.
Should see that the various modifications that execution mode described herein is made do not break away from the spirit and scope of the present invention.For example, except that humidity transducer 109 and 111, also possibly utilize temperature sensor to confirm dew point.Selectively, can under the situation of thinking fit, use humidistat.Moreover humidity sensor 109 and 111 can comprise the dielectric property detector, to confirm the dielectric property of drier.
Many feature and advantage of the present invention can be known and from specify, see, and therefore, the claim of being added is intended to contain of the present invention said characteristic and the advantage in all spirit that fall into essence of the present invention and the scope.And; Because many modifications and change realize for a person skilled in the art easily; Therefore the present invention is not limited to the accurate structure and the operation that illustrate and describe, and therefore, all suitable modifications all are considered to fall into scope of the present invention with the equivalence design.
Claims (13)
1. dehydrating breather apparatus that is used to slough the airborne moisture in the container comprises:
Tank body;
Be connected in the gas channel that can close automatically between said container and the said tank body; Air-flow in the gas channel is controlled to be enabled in the valve in the said gas channel by solenoid; Said solenoid is controlled through signal/power line by control module; Wherein before removing steam circulation beginning or with removing steam, circulate beginning simultaneously, said control module produces signal to the solenoid that is connected with said valve, to close said valve; At end erase steam circulation time, buttoned-up said valve is opened;
Valve chest, said valve chest is connected with said tank body and fixes with assemble mechanism;
Be located at the sealing gasket between said valve chest and the said tank body;
Be located at the ball-cock assembly in the said valve chest, said ball-cock assembly comprises first width that holds ball float and than second width of said first narrow width, spills in order to prevent ball float;
The ventilation assembly, said ventilation assembly is connected with said valve chest, and comprises:
Ventilation assembly body;
At least one screened, said screened is arranged along the vertical axis of said ventilation assembly body;
Be contained in the drier in the said tank body;
Be installed in the automatically controlled heating element in the said tank body;
Drainage pipe in the said tank body; And
Humidity sensor in the said drier.
2. dehydrating breather apparatus as claimed in claim 1 further comprises:
Humidity sensor in the said container.
3. dehydrating breather apparatus as claimed in claim 1 further comprises:
Control unit, it controls opening and closing automatically of said gas channel and said drainage pipe, and the heating of said heating element.
4. dehydrating breather apparatus as claimed in claim 3, wherein said control unit is connected with humidity sensor in the drier.
5. dehydrating breather apparatus as claimed in claim 3, wherein said control unit comprises:
Humidity controller;
Relay controller; And
The communication controler that is connected with said humidity controller.
6. dehydrating breather apparatus as claimed in claim 5 further comprises:
The timing controller that is connected with relay controller with said humidity controller.
7. dehydrating breather apparatus as claimed in claim 1 further comprises:
Dielectric property transducer in the said tank body.
8. dehydrating breather apparatus that is used to slough the airborne moisture in the container comprises:
Be used to absorb the dewater unit of airborne steam and discharge water vapour;
The airflow apparatus that is used for the air of the said container of drainage between said container and said dewater unit;
The outlet device that is used for the steam of drainage discharge;
Be used for blocking said airflow apparatus the drainage air from the moving air flow occluding device;
Be used for blocking the automatic outlet occluding device of the steam that said outlet device discharges;
Valve chest, it is connected with said dewater unit and fixes with assemble mechanism;
Be used to seal the sealing device of said valve chest;
The ventilation assembly, it is connected with said valve chest, and comprises ventilation assembly body and at least one screened of arranging along the vertical axle of said ventilation assembly body;
Heater in the said dewater unit, it is used for heating so that the steam that absorbs discharges from said dewater unit;
Be used to detect the steam sensing device of the airborne steam in the said container; And
Be used to control said heater, said from the moving air flow occluding device with export the control device of occluding device automatically,
Wherein said control device is controlled air-flow in the said airflow apparatus to start said valve from the moving air flow occluding device through solenoid; Said solenoid is controlled through signal/power line by said control device; Wherein before removing steam circulation beginning or with removing steam, circulate beginning simultaneously; Said control device produces signal to the solenoid that is connected with said valve, to close said valve; At end erase steam circulation time, buttoned-up said valve is opened.
9. dehydrating breather apparatus as claimed in claim 8, wherein said control device comprises:
Be used to respond the steam responding device of said steam sensing device;
Timing device during being used to set the repetition period and removing steam;
Be used to control to said switching device from moving air flow occluding device and said automatic outlet occluding device and said heater supply capability.
10. dehydrating breather apparatus as claimed in claim 9, wherein said control device further comprises:
Be used for the communicator with outer equipment exchange information, wherein, said communicator starts or forbids that the steam removing circulates.
11. dehydrating breather apparatus as claimed in claim 8 further comprises:
Be used to detect the second steam sensing device of the steam in the said dewater unit.
12. a dewatering system comprises:
Wherein be closed with the oil groove of air;
Tank body;
Be connected in the gas channel that to close automatically of said oil groove and said tank body; Air-flow in the gas channel is controlled to be enabled in the valve in the said gas channel by solenoid; Said solenoid is controlled through signal/power line by control module; Wherein before removing steam circulation beginning or with removing steam, circulate beginning simultaneously, said control module produces signal to the solenoid that is connected with said valve, to close said valve; At end erase steam circulation time, buttoned-up said valve is opened;
Valve chest, said valve chest is connected with said tank body and fixes with assemble mechanism;
Be located at the sealing gasket between said valve chest and the said tank body;
Be located at the ball-cock assembly in the said valve chest, said ball-cock assembly comprises first width that holds ball float and than second width of said first narrow width, spills in order to prevent ball float;
The ventilation assembly, said ventilation assembly is connected with said valve chest, and comprises:
Ventilation assembly body;
At least one screened, said screened is arranged along the vertical axis of said ventilation assembly body;
Be contained in the drier in the said tank body;
Be installed in the automatically controlled heating element in the said tank body;
The drainage pipe that can close automatically in the said tank body; And
Humidity sensor in the said drier.
13. dewatering system as claimed in claim 12 further comprises:
Humidity sensor in the said oil groove.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/019,272 US7332015B2 (en) | 2002-09-06 | 2004-12-23 | Automatic dehydrating breather apparatus and method |
US11/019,272 | 2004-12-23 | ||
PCT/US2005/046975 WO2006069360A2 (en) | 2004-12-23 | 2005-12-23 | Dehydrating breather apparatus and method |
Publications (2)
Publication Number | Publication Date |
---|---|
CN101128891A CN101128891A (en) | 2008-02-20 |
CN101128891B true CN101128891B (en) | 2012-12-19 |
Family
ID=36177961
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN2005800486184A Expired - Fee Related CN101128891B (en) | 2004-12-23 | 2005-12-23 | Automatic dehydrating breather apparatus and dehydrating system |
Country Status (10)
Country | Link |
---|---|
US (1) | US7332015B2 (en) |
EP (1) | EP1844480A2 (en) |
KR (1) | KR101224260B1 (en) |
CN (1) | CN101128891B (en) |
AU (1) | AU2005318956B2 (en) |
BR (1) | BRPI0519359A2 (en) |
CA (1) | CA2593528C (en) |
HK (1) | HK1112528A1 (en) |
MX (1) | MX2007007832A (en) |
WO (1) | WO2006069360A2 (en) |
Families Citing this family (38)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10357085B3 (en) * | 2003-12-06 | 2005-03-17 | Maschinenfabrik Reinhausen Gmbh | Air de-humidifying method for oil-insulated transformer, choke coil or stepping switch uses humidity-absorbing granules heated by electric heating device |
US7642455B2 (en) * | 2005-11-16 | 2010-01-05 | Wakchaure V K | Transformer conservator isolation valve (TCIV) |
DE102006009668B3 (en) * | 2006-03-02 | 2007-04-12 | Maschinenfabrik Reinhausen Gmbh | Method of drying a moisture-absorbing material in an air treatment unit for oil-isolated transformers, coils or switches controls heating to when no air flows into their expansion units |
US20080229605A1 (en) * | 2007-03-23 | 2008-09-25 | Brown Jerome R | Gas drying assembly with cartridge and method |
GB2450758A (en) * | 2007-07-06 | 2009-01-07 | Cummins Generator Technologies | Device for reducing moisture in a rotating electrical machine |
EP2113929B1 (en) * | 2008-04-28 | 2010-12-22 | ABB Technology Ltd | Method and device for determining the relative humidity of an insulating liquid filled electric apparatus |
DE102010003710A1 (en) * | 2010-04-08 | 2011-10-13 | Endress + Hauser Gmbh + Co. Kg | Method and device for determining a proportion of an adsorbed substance contained in an adsorbent material |
EP2514511B1 (en) * | 2011-04-20 | 2019-07-31 | ABB Schweiz AG | Air dehydrating breather assembly for providing dehumidified air to electrical devices, and related method |
KR101108485B1 (en) * | 2011-09-16 | 2012-01-31 | 성진종합전기 주식회사 | Respirator with valve |
CN102360755B (en) * | 2011-09-20 | 2013-05-15 | 咸阳供电局 | a respirator |
CN102784549A (en) * | 2012-08-28 | 2012-11-21 | 温州菲德石化科技有限公司 | Automatic regenerating dust-removing dewatering device for instrument air |
PL2904225T3 (en) * | 2012-10-04 | 2020-01-31 | Des-Case Corporation | Diagnostic breather dryer |
US11338241B2 (en) * | 2012-10-04 | 2022-05-24 | Des-Case Corporation | Diagnostic breather dryer |
US8871005B2 (en) * | 2012-12-31 | 2014-10-28 | Qualitrol Company, Llc | Methods of regenerating desiccant in a breathing apparatus |
US8748723B1 (en) * | 2013-03-14 | 2014-06-10 | Boveda, Inc. | Humidity control system for wood products |
EP2899728B2 (en) * | 2014-01-22 | 2019-11-13 | ABB Schweiz AG | A device comprising a high voltage apparatus including a fluid and equipment for detecting one or more physical properties of the fluid |
US10500537B2 (en) | 2015-07-01 | 2019-12-10 | Easun-Mr Tap Changers (P) Ltd | Regenerating breathers system |
US9750811B2 (en) | 2015-09-15 | 2017-09-05 | Boveda, Inc. | Devices and methods for controlling headspace humidity and oxygen levels |
FR3042306B1 (en) * | 2015-10-08 | 2017-10-27 | Sncf Mobilites | DRIVER FOR IMMERSE ELECTRICAL APPLIANCE |
GB2543089B (en) * | 2015-10-09 | 2020-04-29 | Mohan Instrumentation Services Ltd | Rail Mounting Desiccant Unit |
US9874190B2 (en) | 2016-01-26 | 2018-01-23 | Cummins Power Generation Ip, Inc. | Crank only exercise mode |
US10008965B2 (en) | 2016-01-26 | 2018-06-26 | Cummins Power Generation Ip, Inc. | Genset remote start control |
US10863638B2 (en) * | 2016-05-24 | 2020-12-08 | Eaton Intelligent Power Limited | Moisture control systems for enclosures |
CN106228766B (en) * | 2016-09-13 | 2018-05-22 | 国网山东省电力公司德州供电公司 | Transformer breather shows early warning system |
US12098015B2 (en) | 2016-10-12 | 2024-09-24 | Boveda Inc. | Device for controlling headspace humidity and methods for making the same |
US10081465B2 (en) | 2016-10-12 | 2018-09-25 | Lissa BIESECKER LONGACRE | Container assembly and closure with predetermined humidity and related method |
CN106783041A (en) * | 2016-11-25 | 2017-05-31 | 国网河南省电力公司平顶山供电公司 | A kind of electronics silica gel tank |
CN107064135A (en) * | 2017-04-25 | 2017-08-18 | 山东电力设备有限公司 | Electric power transformer breathing apparatus is monitored on-line and regenerative system |
CN107289976A (en) * | 2017-04-25 | 2017-10-24 | 山东电力设备有限公司 | The on-line monitoring and renovation process of a kind of electric power transformer breathing apparatus |
US10612852B2 (en) * | 2018-01-11 | 2020-04-07 | Fortune Electric Co., Ltd. | Transformer system and control method of air-drying device thereof |
CN108310908A (en) * | 2018-04-26 | 2018-07-24 | 广东电网有限责任公司 | CT gas chambers adsorbent equipment and current transformer adsorbent equipment |
US10876446B2 (en) * | 2018-05-14 | 2020-12-29 | Des-Case Corporation | System and apparatus for a diagnostic breather dryer having a coupleable expansion pack |
KR101951038B1 (en) * | 2018-12-14 | 2019-02-22 | 두원전력(주) | Moisture absorber for transformer preventing leakage of insulating oil |
CN110013743B (en) * | 2019-04-24 | 2024-10-01 | 新能科电气有限公司 | Water-steam separation device |
WO2021024277A1 (en) * | 2019-08-08 | 2021-02-11 | Easun - Mr Tap Changers (P) Ltd | Time based automatic self-regenerating breather |
EP3789103B1 (en) * | 2019-09-04 | 2022-04-13 | COMEM S.p.A. | A breather device for dehumidifying air to be supplied to an expansion vessel of a power electrical apparatus |
IT202100012284A1 (en) * | 2021-05-13 | 2022-11-13 | Comem Spa | FILTERING DEVICE FOR SELF-REGENERATING DRYERS |
CN113390684A (en) * | 2021-06-02 | 2021-09-14 | 苏州西热节能环保技术有限公司 | Efficient drying and filtering device for flue gas sampling |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4322223A (en) * | 1979-03-30 | 1982-03-30 | Pall Corporation | Adsorbent fractionators with electronic sequence timer cycle control and process |
Family Cites Families (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2083732A (en) | 1932-11-22 | 1937-06-15 | Pittsburgh Res Corp | Adsorbent apparatus |
US2505581A (en) * | 1945-03-26 | 1950-04-25 | Gen Electric | Means for drying gas in electrical apparatus |
GB1199941A (en) * | 1967-04-19 | 1970-07-22 | Grace W R & Co | A Gas Breather Assembly |
US3572008A (en) | 1968-10-25 | 1971-03-23 | Hankison Corp | Methods and means for cleaning and drying compressed fluid systems |
US4127395A (en) * | 1976-10-18 | 1978-11-28 | Pall Corporation | Adsorbent fractionator with fail-safe automatic cycle control and process |
IT1121117B (en) * | 1979-06-06 | 1986-03-26 | Lattuada Sergio | METHOD TO AUTOMATE AND OPTIMIZE THE OPERATING CYCLE OF ADSORPTION DEHYDRATION PLANTS |
CA1158991A (en) | 1980-05-02 | 1983-12-20 | Barton A. Gravatt | Adsorbent fractionator with automatic cycle control and process |
US4543446A (en) | 1981-02-09 | 1985-09-24 | General Electric Company | Vaporization-cooled transformer havig provisions for replenishment of molecular sieve material |
US4546442A (en) | 1982-11-24 | 1985-10-08 | Pall Corporation | Microcomputer control system for desiccant dryer |
US4504286A (en) * | 1984-04-25 | 1985-03-12 | Phillips Petroleum Company | Automatic drying tower switching system |
JPS61174707A (en) | 1985-01-30 | 1986-08-06 | Toshiba Corp | Gas insulation transformer |
US5427609A (en) | 1993-09-14 | 1995-06-27 | Horton Industries, Inc. | Device for cleaning and drying compressed gas |
US6235192B1 (en) | 1997-03-20 | 2001-05-22 | Parker-Hannifin Corporation | Biflow drier with improved filtration |
US5902381A (en) | 1997-05-30 | 1999-05-11 | General Signal Corporation | Dehydrating breather apparatus |
US6071321A (en) | 1997-11-26 | 2000-06-06 | Westinghouse Air Brake Company | E-1 air dryer liquid separator with baffle |
DE20104259U1 (en) | 2001-03-01 | 2001-06-07 | Siemens AG, 80333 München | Dehumidifier for oil-insulated transformers or inductors |
TR200400886T4 (en) * | 2001-11-13 | 2004-07-21 | Maschinenfabrik Reinhause Gmbh | Air dehumidifier for oil-insulated transformers, steam or gas coils and step switches. |
US6797037B2 (en) | 2002-09-06 | 2004-09-28 | Waukesha Electric Systems, Incorporated | Dehydrating breather apparatus and method |
DE10315719B3 (en) | 2003-04-04 | 2004-12-23 | Maschinenfabrik Reinhausen Gmbh | Dehumidifier for oil-insulated transformers, choke coils and tap changers |
-
2004
- 2004-12-23 US US11/019,272 patent/US7332015B2/en not_active Ceased
-
2005
- 2005-12-23 WO PCT/US2005/046975 patent/WO2006069360A2/en active Application Filing
- 2005-12-23 AU AU2005318956A patent/AU2005318956B2/en not_active Ceased
- 2005-12-23 CN CN2005800486184A patent/CN101128891B/en not_active Expired - Fee Related
- 2005-12-23 MX MX2007007832A patent/MX2007007832A/en active IP Right Grant
- 2005-12-23 KR KR1020077016920A patent/KR101224260B1/en active Active
- 2005-12-23 EP EP05857210A patent/EP1844480A2/en not_active Withdrawn
- 2005-12-23 CA CA2593528A patent/CA2593528C/en active Active
- 2005-12-23 BR BRPI0519359-1A patent/BRPI0519359A2/en not_active Application Discontinuation
-
2008
- 2008-06-06 HK HK08106320.0A patent/HK1112528A1/en not_active IP Right Cessation
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4322223A (en) * | 1979-03-30 | 1982-03-30 | Pall Corporation | Adsorbent fractionators with electronic sequence timer cycle control and process |
Non-Patent Citations (1)
Title |
---|
JP昭61-174707A 1986.08.06 |
Also Published As
Publication number | Publication date |
---|---|
CA2593528A1 (en) | 2006-06-29 |
US20050103195A1 (en) | 2005-05-19 |
AU2005318956B2 (en) | 2011-04-21 |
US7332015B2 (en) | 2008-02-19 |
KR20070095968A (en) | 2007-10-01 |
CN101128891A (en) | 2008-02-20 |
MX2007007832A (en) | 2007-11-08 |
KR101224260B1 (en) | 2013-01-18 |
EP1844480A2 (en) | 2007-10-17 |
WO2006069360A2 (en) | 2006-06-29 |
BRPI0519359A2 (en) | 2009-01-20 |
AU2005318956A1 (en) | 2006-06-29 |
HK1112528A1 (en) | 2008-09-05 |
WO2006069360A3 (en) | 2006-08-24 |
CA2593528C (en) | 2014-07-29 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN101128891B (en) | Automatic dehydrating breather apparatus and dehydrating system | |
USRE42058E1 (en) | Automatic dehydrating breather apparatus and method | |
CN202199249U (en) | Air drier for drying air entering oil expansion tank of electric device | |
JP2008118039A (en) | Moisture absorption respiratory apparatus | |
US7563310B2 (en) | Air dehumidifier for oil-insulated transformers, choke coils and steps switches | |
KR20200109528A (en) | Ventilator | |
CN1860563B (en) | Air de-humidifying method and device for oil-insulated transformer, choke coil or stepping switch | |
EA027467B1 (en) | Drain arrangement for heat recovery unit | |
CZ292922B6 (en) | Device for reducing contamination of transformer charges with gases and water | |
KR102076959B1 (en) | Moisture absorber for transformer preventing leakage of insulating oil | |
US6990819B2 (en) | Dryer system for the prevention of frost in an ultra low temperature freezer | |
US11729947B2 (en) | Cooling system of server | |
CN215342227U (en) | Side air inlet type intelligent maintenance-free transformer moisture absorber | |
JPH04320743A (en) | Natural evaporation type humidifier | |
RU185232U1 (en) | COMPRESSED GAS DRYER BASED ON PELTIER ELEMENTS | |
JPS6238072Y2 (en) | ||
KR102693261B1 (en) | Method of inspecting water purifier with ice maker | |
CN118899147B (en) | Transformer formula respirator with oil quality detection function | |
US20080246169A1 (en) | Filtering structure of a humidifier | |
CN214597921U (en) | Waterproof ventilative type non-maintaining desiccator | |
JPH076824Y2 (en) | Kitchen storage with dry storage container | |
WO2022239044A1 (en) | Filtering device for a self-regenerating breather device | |
JP2018096591A (en) | Sealing mechanism and refrigerator having storage chamber including sealing mechanism | |
CN118366754A (en) | Dampproof device, dampproof method and application in outdoor current transformer | |
SU1222955A1 (en) | Hydraulic back-pressure valve |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
C06 | Publication | ||
PB01 | Publication | ||
C10 | Entry into substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
REG | Reference to a national code |
Ref country code: HK Ref legal event code: DE Ref document number: 1112528 Country of ref document: HK |
|
C14 | Grant of patent or utility model | ||
GR01 | Patent grant | ||
REG | Reference to a national code |
Ref country code: HK Ref legal event code: GR Ref document number: 1112528 Country of ref document: HK |
|
CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121219 Termination date: 20191223 |
|
CF01 | Termination of patent right due to non-payment of annual fee |